1 files changed, 76 insertions, 0 deletions
diff --git a/src/inc/ilformatter.h b/src/inc/ilformatter.h
new file mode 100644
index 0000000000..7593aa65bc
--- /dev/null
+++ b/src/inc/ilformatter.h
@@ -0,0 +1,76 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+
+
+/***************************************************************************/
+/*                             ILFormatter.h                               */
+/***************************************************************************/
+
+#ifndef ILFormatter_h
+#define ILFormatter_h
+
+#include "opinfo.h"
+#include "outstring.h"
+
+struct IMetaDataImport;
+
+#define INVALID_IL_OFFSET 0x80000000
+
+/***************************************************************************/
+class ILFormatter {
+public:
+	ILFormatter() : start(0), targetStart(0), stackStart(0) {}
+
+	ILFormatter(IMetaDataImport* aMeta, const BYTE* aStart, 
+                const BYTE* aLimit, unsigned maxStack, const COR_ILMETHOD_SECT_EH* eh) 
+		: targetStart(0), stackStart(0) {
+		init(aMeta, aStart, aLimit, maxStack, eh);
+		}
+    ~ILFormatter() { delete [] stackStart; delete [] targetStart; }
+
+	void init(IMetaDataImport* aMeta, const BYTE* aStart, 
+              const BYTE* aLimit, unsigned maxStack, const COR_ILMETHOD_SECT_EH* eh);
+	const BYTE* formatStatement(const BYTE* stmtIL, OutString* out);
+	const BYTE* formatInstr(const BYTE* instrIL, OutString* out);
+private:
+
+	void formatInstrArgs(OpInfo op, OpArgsVal arg, OutString* out, size_t curIP=INVALID_IL_OFFSET);
+    void formatArgs(unsigned numArgs, OutString* out);
+    void spillStack(OutString* out);
+    void setStackAsTarget(size_t ilOffset);
+    void setTarget(size_t ilOffset, size_t depth);
+
+private:
+	const BYTE* start;				// keeps us sane
+	const BYTE* limit;
+	IMetaDataImport* meta;			// used to parse tokens etc
+
+    struct StackEntry {
+        OutString val;
+        int prec;
+    };
+
+    struct Target {
+        size_t ilOffset;
+        size_t stackDepth;
+    };
+
+    Target* targetStart;
+    Target* targetEnd;
+    Target* targetCur;
+
+    size_t stackDepth();
+    void pushAndClear(OutString* val, int prec);
+	OutString* pop(int prec = 0);
+	OutString* top();
+    void popN(size_t num);
+
+	StackEntry* stackStart;
+	StackEntry* stackEnd;
+	StackEntry* stackCur;   	// points at the next slot to fill
+
+};
+
+#endif
+